Guide for drilling implements



June 5, 1951 G. H. FUEHRER GUIDE FOR DRILLING IMPLEMENTS Filed May 17,1946 INVENTOR leoayeH-Fhevev H! 5 ATTORNEY.

Patented June 5, 1.951

GUIDE FOR DRILLING IMPLEMENTS George H. Fuehrer, Phllipsburg, N. J.,assignor to Ingersoll-Rand Coin a corporation of New Je pany, New York,N. Y., rsey Application May 17, 1946, Serial No. 670,421

(CI. Z55-51) 2 Claims.

This invention relates to rock drilling mechanism of the rotary typeserving to actuate drilling implements consisting of sections suitablyconnected together, and more particularly to a guide for drillingimplements of this type.

One object of the invention is to stabilize the overhanging portion ofthe drilling implement and thereby maintain its cutting end in axialalignment with the drilling machine.

Another object is to enable the guide to be used as a vise to hold thedrilling implement immovable and` to support its weight during theoperations of lengthening and shortening the drilling implement.

Other objects will be in part obvious and in part pointed outhereinafter.

In the drawings accompanying this specioation and in which similarreference numerals refer to similar parts,

Figure 1 is a side elevation of a rock drilling mechanism equipped witha guide constructed in accordance withA the practice of the invention,

Figure 2 is a transverse view taken through Figure 1 on the line 2 -2showing the parts of the guide positioned for guiding a drillingimplement,

Figure 3 is a similar view showing the parts in position to clamp thedrilling implement to the guide,

Figure 4 is a top plan View of the guide showing the parts in thepositions they will occupy for releasing the drilling implement from theguide, and

Figures 5 and 6 are transverse views taken through Figure 2 on the lines5-5 and 6--5, respectively.

Referring more particularly to the drawings, designates, in general, adrilling machine mounted upon a column or bar 2| for rotating andimparting feeding movement to a drilling implement 22.

The drilling machine may be secured to the bar 2| by any suitableclamping device 23 and has an enlargement 24 on a side thereof toreceive slidably a bar 25 having adjustable pointers 26 at its ends toengage supporting surfaces 21 for stabilizing the drilling machine. Thebar has holes 28 spaced along its length to register with an aperture 29in the enlargement 24, and a pin 3l! extending through the aperture intoone of the holes 28 secures the bar 25 to the enlargement.

The drilling implement may be of any well known type consisting of aplurality of tubular rod sections 3| that are threadedly connectedtogether at their ends and one end section 3| carries a cutting bit (notshown) for drilling a hole 32 in the work. The opposite endof thedrilling implement is secured to the feed screw 33 of the drillingmachine by a chuck 34.

The bar 25 is arranged in parallelism with the drilling implement 22,and the end portion of said bar adjacent the working surface supports aguide 35 comprising an arm 36 having a split hub 31 at one end portionto receive the bar 25, and on the opposite sides of the slot 38 in thehub are lugs 39 and a bolt 45 extends therethrough for clamping the armto the bar 25.

Near the opposite end and in the side surface of the arm 33 is a partlycircular groove 4| that lies in parallelism with the hub 31 andcooperates with a similar groove 42` in the opposed surface of a plate43 overlying the side of the arm 35 to define a guideway 44 for thedrilling implement 22. The arm 35 has flatted surfaces 45 and t whichare located, respectively, forwardly of the groove 4| and immediatelyforwardly of the hub 31 and serve as seats for surfaces 41 and 43 on theplate 43. The plate is held against the f" arm by a bolt 49 extendingthrough apertures 50 and 5| in the plate and the arm, respectively, andby a nut 52 on the bolt seating against the arm. The head 53 of the boltlies between a pair of reinforcing ribs 54 extending along the outersurface of the plate 43 to prevent relative rotation between the plateand the bolt.

To the end that the guide may also be used as a vise for holding thedrilling implement immovable and to support its weight so that sections3| may be conveniently attached to the drilling implement or removedtherefrom, the plate 43 serves the additional function of a clampingmember. It is accordingly provided in the end portion adjacent theseating surface 418, and in the surface containing the groove 42, with asecond groove 55 which conforms with the curvature of the drillingimplement.

The grooves 42 and 55 are spaced equi-distantly from the aperture 50 butat different distances from the adjacent ends of the plate 43, thegroove 55 being nearer an end of the plate than the groove 42. Owing tothis arrangement, the only points of contact between the arm 3B and theplate 43 will be between the seating surfaces 46 and 41 when the plateis positioned to place the wall of the groove into engagement with thedrilling implement, in the manner shown in Figure 3 of the drawings. Theplate will then be free to tilt relatively to the arm in response toforce applied through the medium of the bolt 49 and the nut 52 forsecuring the drilling implement to the guide.

In order that the plate 43 may be conveniently retained in the correctoperative positions with respect to the drilling implement said plate isl provided with a rib 56 on the side confronting the arm 36 to extendinto a slot 51 in the arm, and the Vslot is of ample depth so thatclearances will exist between the rib and the bottom of the slot in boththe guiding and clamping positions of the plate.

The nut 52 is an elongated member having a pairV of heads 58 and 59 forturning it. The

Y head 58 is located adjacent the arm 36 and is roughened on itsperiphery-to provide a suitable Y gripping surface for the Yhand of theoperator.

Vengagement with the groove 63.

To the end that the wrench 6l may at all times be conveniently availablefor use on the head 59, the nut 52 is provided with a terminal portion65 of cylindrical shape to support the wrench 6| when not in use. Thewrench is retained on the portion 65 by the head 66 of a screw 6lthreaded into the nut 52.

In practice, and when the plate 43 is positioned to assist in guidingthe drilling implement 22, the surfaces 4l and 46 will seat upon thesurfaces 45 and 48 and will be clamped thereagainst by'the bolt 49 andthe nut 52. In this position of the plate the drilling implementmayrotate freely with respect to the guide and will be retained thereby insubstantial axial alignment with the drilling machine 26 and the drillhole.

Whenever it is intended to remove the drilling implement from the drillhole, the drilling machine 20 is rst rocked out of alignment with thedrilling implement, in the usual manner, and the drilling implement isretracted until a joint connecting two sections V3| lies between theguide and the drilling machine. The plate 43 is then placed in theclamping position shown in Figure 3 and drawn against the drillingimplement by means of the bolt 49 and the nut 52 to clamp the drillingimplement against the arm 36. A rod section may then be convenientlyremoved by one attendant without danger of a shortened drillr ingimplement dropping back into the hole. operation may be repeated untilall the sections 3l have been disconnected from each other. `Similarly,whenever` it is desired to assemble a drilling implement for insertioninto an existing drill hole, each section is held immovable by the guideuntil another section has been added to the string. f

I claim:

1. A guide for drilling implements, comprising an arm having a hub atone end and a grooveV adjacent the other end to slidably receive adrilling implement, a bolt in the arm between the hub and the groove,seats on the arm on opposite sidesV of the bolt, a plate on the bolt tobear against the seats in one position of said plate for cooperationwith the groove to deiine a guideway for guiding the drilling implementand being rotatable on the bolt to another position for engagement withsuch drilling implement and only one of the said seats for holding thedrilling implement immovable in the groove,`

and means on the bolt for imparting clamping pressure thereto in bothpositions of the plate.

2. A guide for drilling implements, comprising an arm having a hub atone end and a groove adjacent the other end to slidably receive adrilling implement, a bolt in the arm between the hub and the groove, aseat on the arm between the hub and the bolt, a seat on the armAadjacent the groove, a plate rotatable on the bolt to bear in oneposition of said plate against both seats for cooperation with thegroove to define a guide- Way for guiding the drilling implement and tobear against only the rst mentioned seat and such drilling implement inanother position of the plate for holdingrthe drilling implementimmovable in the groove, and means on the bolt for imparting clampingpressure thereto in both positions of the plate. p

GEORGE H. FUEHRER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date $327,381 Scoggins July 6,19091,115,594 ShallenbergerV Nov. 3, '1914 1,203,145 Sheppard Oct. 31,1916.1.352.810 Hunt Sept. 14, 1920 1.632.400 Gilman June 14, 1927 1,644,026Mock Oct. 4,1927 l1,986,266 Hirschberg Jan. 1, 1935

